Leaching-vat.



W. H. TEAS.

LEAGHING VAT.

APPLIUATION FILED AUG. 5, 1909.

Patented Mar.v 8,1910.

W. H. TEAS.

LEAGHING VAT.

APPLIGATION FILED AUG. 5, 1909.

951,206, Patented Mans, 1910.

2 SHEETS-SHEET 2.

VJILLIAM HOLMES TEAS, OF RIDGWAY, PENNSYLVANIA.

LnAoHINGi-ver.

Specification of Letters Patent.

Application led August 5, 1909.

Patented Mar. 8, 1910. Serial No. 511,425.

T o all whom it may concern:

Be it known that I, WILLIAM H. Teas, a citizen of the United States,residing at Ridgway, in the county of Elk and State of Pennsylvania,have invented a new and uset'ul Leaching-Vat, of which the following isa specification.

This invention relates to improvements in leaching apparatus for thepreparation of tanning liquors and tanning extracts and consists incertain novel features which will be hereinafter first fully describedand then particularly pointed out in the claims.

In leaching barks, woods, leaves or other material so that the resultingdecoction may be used as a tanning liquor either directly or afterconcentration to the extract form, a series of vats is used. The wateror liquid, after being put on the tirst vat in the series, flows or ispumped to the next vat in the series and will be carried successivelyrthrough all the vats of the system and then transferred to a storagevat. This water or liquor must be heated and maintained at thetemperature desired by the operator and my present invention relatesmore particularly to the means for heating the liquor.

In the accompanying drawings, which fully illustrate my invention,Figure 1 is a vertical longitudinalsection of two vats arranged tocommunicate and provided with my improvements. Fig. 2 is a plan view ofthe same. Fig. 3 is a detail vertical sectional view, taken on the line3 3 of Fig. 1. Fig'. t is a detail plan view showing a slightly modifiedapplication of the invention.

The vats 1 may be of any desired size and are provided with a truebottom 2 and also a false bottom 3 composed of slats secured a shortdistance above the true bottom and having their edges beveled and spacedapart, as clearly shown. Disposed centrally in the vat and extendingthrough both the true and false bottom is an outlet 4c provided with asuitable closure 5 through which the spent material may be withdrawnfrom the vat. The vats are connected near their upper' ends by troughs 6in which is a slidable cutotl' or valve 7 which is disposed transverselyin the trough and is slidable vertically in suitable ways provided onthe sides ot the trough, as will be readily understood. Depending fromthe bottom of the trough and disposed between the gate or valve 7 andthe receiving end of the trough is a discharge pipe S provided with asuitable valve 9 by which the liquor may be withdrawn from the troughand transferred to the storage vat when it has reached the desiredstrength. It will be understood that the valve 9 is closed except whenthe gate 7 is closed and that the liquor will be either drawn ott fromthe trough to the storage tanlr or-will be permitted to flow through thetrough from one vat to the next vat in the series, the direction of iowbeing indicated by arrows in Fig. 1. a llVithin each vat at one side ofthe same is a heating compartment 10, which, in the preferred form, isprovided by a partition 11 arranged vertically within the vat andextending to the bottom of the same. An inlet 12 is provided in thelower end of this partition between the true bottom 2 and the falsebottom 3, and the tlow through the said inlet is controlled by a gatevalve 13, the stem of which is pivoted to a lever 14 fulcrumed upon thepartition 11 and extending across the valve and having its free endpivotally attached to the lower end of a pitman or connecting rod 15which extends up through the heating compartment and has its upper endpivoted to an operating lever or handle 16 t'ulcrumed upon the side ofthe vat, as will be readily understood.

Disposed above the vats and extending along the entire series are awater main or pipe 17 and a steam main or pipe 18 from which branchpipes depend into the heating compartment lO. The branch water pipe 19extends downward to near the bottom of the heating compartment and isprovided near its upper end with a cut-olf valve 20 by which the flowlof water or liquor may be controlled, it being understood that thefunction of this pipe is to furnish the supply of liquor in the leachingoperation. The depending branch steam pipe 21 is provided near its upperend with a cut-off valve 22 by which the flow of steam to the heatingcompartment may be regulated, and the lower portion of the said pipe 21is provided with a number of pertorations 23 through which the steam mayescape. This escaping steam will be condensed by the liquor in theheating compartment and will raise the temperature of the same, and inorder to prevent loss of the live steam, a hood 24 is secured on thepipe 21 just above the said perforations.

In the accompanying drawings, I have to pass through the false bottomand eolg lect in the space between the saine and the true bottom. The'valve 13 being open, the liquor will flow into the heating compartmentlO and will rise within the saine and overflow into the trough (3. As itrises through the heating compartment, the liquor will mingle with thesteam trom the pipe 2l and will. be thereby raised to the desiredItemperature so that it will be heated when i passing into and throughthe trough t3. 'it t-he mlve 9 is closed and the gate or valve 7 isopened, the liquor will How into the next vat of the series and bedelivered upon the material in the said vat and this operation will berepeated until the liquorl has attained the desired strength. Should itbe desired to draw oil' the liquor, the gate T is closed and the valve 9is opened whereupon the liquor will flow through the discharge 8 to thestorage tank or vat. Should the material in any vat, for instance, thevat shown at the right in F ig. l, be spent, the valve 13 is closed bymeans or' the lever 1G and lits connections so as to prevent furthertlow through the outlet l2 and an additional supply of water or liquoris admitted to the heating compartment through the branch pipe 19. Thiswater or liquor will be raised in temperature by its contact with thesteam Yfrom the pipe 2l and will pass into the vat at the left oi F ig.l through the trough G, as will be readily understood. The spent materialmay then be withdrawn from the vat at the right and the said yatcleaned and then again placed in operation after receiving a freshsupply of material.

In Fig. et I have shown ay slight modification of Athe invention inwhich the heating compartment 30 is arranged on the outside of the vat3l `instead ot within the vat,

aud the. trough G leads directly from the upper end ot the heatingeompartment, as will. be readihv understood.

My device is simple in .its construction, may be very easily manipulatedand is eitlieient in operation.

Having thus deserihed my invention, wha t l elaim is:

l. In a leaehing apparatus, the combination ot mts, a trough toi-ming acommunieatiou between the upper ends ot the mts, a eut-oil' valvedisposed transversely in the trough` and a valved discharge pipe.leading trom the bottom oit the trough between the said euteotl valveaud the entrance end oi the trough.

2. Yl`he eon'iliiination ot a vat, a heating eonqnirtmeut arranged onthe side of the vat and eommuuieating therewith at the lower endthereot, a liquor main disposed above the vat. a heating main disposedabove the vat. and branch pipes leading trom the said mains respeetivelyand terA minating in theI heating' compartment.

It. yllhe combination ot a yat, a heating compartment at one side oitthe vat, a liquor main disposed above the vat, a heating main alsodisposed above the vat, and valved pipes leading from the said mainsinto 'the heat`- ing compartment, the pipe leading trom the said heatingmain boing provided with a eoiidensiug hood within the compartment.

li. lfhe combination ot a series of vats, a vertiei ily dispose-:lheating compartment on one side ot each vat, and conmiunieating with thevat at its lower end only, troughs connecting the upper end ot eachheating eoiui irtment with the succeeding vat, a steam pipe having itsend in said compartment, and a liquor supplj,r pipe also having its endin the d compartment.

in testimony that l claim the foregoing as my own, hai e hereto atlixedmy signature in the presence of two witnesses.

iiflLLLivi HtlLMiES TRAS. llitnesses:

R. (l. liicFAnnaNn, il. A. BnioonN.

